Quick Start Guide

A guide to the most commonly used features of OpenSoundscape.

Installation

Details about installation are available on the OpenSoundscape documentation at OpenSoundscape.org. FAQs:

How do I install OpenSoundscape?

Most users should install OpenSoundscape via pip, preferably within a virtual environment: pip install opensoundscape==0.10.1.
To use OpenSoundscape in Jupyter Notebooks (e.g. for tutorials), follow the installation instructions for your operating system, then follow the “Jupyter” instructions.
Contributors and advanced users can also use Poetry to install OpenSoundscape using the “Contributor” instructions

Will OpenSoundscape work on my machine?

OpenSoundscape can be installed on Windows, Mac, and Linux machines.
It has been tested on Python 3.8, 3.9, 3.10, and 3.11.
For Apple Silicon (M1 chip) users, Python >=3.9 is recommended and may be required to avoid dependency issues.
Most computer cluster users should follow the Linux installation instructions

Use Audio and Spectrogram classes

from opensoundscape import Audio, Spectrogram

#load an audio file and trim out a 5 second clip
my_audio = Audio.from_file("/path/to/audio.wav")
clip_5s = my_audio.trim(0,5)

#create a spectrogram and plot it
my_spec = Spectrogram.from_audio(clip_5s)
my_spec.plot()

Load audio starting at a real-world timestamp

from datetime import datetime; import pytz

start_time = pytz.timezone('UTC').localize(datetime(2020,4,4,10,25))
audio_length = 5 #seconds
path = '/path/to/audiomoth_file.WAV' #an AudioMoth recording

Audio.from_file(path, start_timestamp=start_time,duration=audio_length)

Use a pre-trained CNN to make predictions on long audio files

from opensoundscape import load_model

#get list of audio files
files = glob('./dir/*.WAV')

#generate predictions with a model
model = load_model('/path/to/saved.model')
scores = model.predict(files)

#scores is a dataframe with MultiIndex: file, start_time, end_time
#containing inference scores for each class and each audio window

Train a CNN using audio files and Raven annotations

from sklearn.model_selection import train_test_split
from opensoundscape import BoxedAnnotations, CNN

# assume we have a list of raven annotation files and corresponding audio files
# load the annotations into OpenSoundscape
all_annotations = BoxedAnnotations.from_raven_files(raven_file_paths,audio_file_paths)

# pick classes to train the model on. These should occur in the annotated data
class_list = ['IBWO','BLJA']

# create labels for fixed-duration (2 second) clips
labels = all_annotations.one_hot_clip_labels(
  cip_duration=2,
  clip_overlap=0,
  min_label_overlap=0.25,
  class_subset=class_list
)

# split the labels into training and validation sets
train_df, validation_df = train_test_split(labels, test_size=0.3)

# create a CNN and train on the labeled data
model = CNN(architecture='resnet18', sample_duration=2, classes=class_list)
model.train(train_df, validation_df, epochs=20, num_workers=8, batch_size=256)

Train a CNN with labeled audio data (one label per audio file):

from opensoundscape import CNN
from sklearn.model_selection import train_test_split

#load a DataFrame of one-hot audio clip labels
df = pd.read_csv('my_labels.csv') #index: paths; columns: classes
train_df, validation_df = train_test_split(df,test_size=0.2)

#create a CNN and train on 2-second spectrograms for 20 epochs
model = CNN('resnet18', classes=df.columns, sample_duration=2.0)
model.train(train_df, validation_df, epochs=20)
#the best model is automatically saved to a file `./best.model`